# Fea engineer Interview Questions

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Fea Engineer interview questions shared by candidates### When modeling rubber like material in explicit FEA, you can't set Poisson's ratio as 0.5. Why? What would happen in the solver if you do that? I noted that it leads to an infinity in the stiffness matrix but he wanted more details.

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Velocity @n+1/2 and disp @n+1 after calculating accelerations at nth time

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How does explicit FEA solve governing equations? and what does this solve for? Told him that it solves for accelerations and then computes damping and displacement in next timesteps.... Less

### How to improve the permanent displacement of the connector

1 Answers↳

lower the length of the pin and change to a harder material

### Do you know vibration?

1 Answers↳

Yes, I took the course in my undergraduate education. But most of my experience is in aerospace static stress analysis. I'm assuming you would have a good documentation there for new starters in automotive. (they literally didn't have anything to study & etc.) Less

### What properties determine the natural frequency of a simple system (a mass point on a spring), and which way?

1 Answers↳

Stiffness, which is related to the material and shape of the spring. The greater the stiffness, the higher the frequencies. Mass. The greater the mass, the lower the frequencies. Omega = sqrt(k/m). Less